"The prison is built on toxic waste. I also got gout from the food there," he told CNN.

The actor and comedian revealed his condition during an interview about his support for decriminalizing marijuana use and sales, so it's not surprising how he plans on treating his illness.

"I've got prostate cancer, and I'm treating it with hemp oil, with cannabis. So [legalizing marijuana] means a lot more to me than just being able to smoke a joint without being arrested," he explained, adding that he was drug free for nearly three years, during which time he began having health problems. "So I know [the cancer] had nothing to do with cannabis. Cannabis is a cure."

Chong also explained he quit smoking marijuana about a year ago, so to treat his prostate cancer he ingests hemp oil, but only "at night, so I won't be woozy all day," he explained.